NWK914B datasheet(5/9 Pages) ZARLINK

Part #	NWK914B

Description	PHY/PMD High Speed Copper Media Transceiver

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Manufacturer	ZARLINK [Zarlink Semiconductor Inc]

Direct Link	http://www.zarlink.com

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5

NWK914D

Fig.4 Transmit timing waveform

Fig.5 Receive timing waveform

AC CHARACTERISTICS

Recommended operating conditions apply except where stated.

Characteristic

Units

Conditions

AC characteristics

100Mb/s TX driver outputs rise/fall times

-

2.5

-

ns

100

Ω differential load

pins TXOP, TXON

measured at RJ45

REFCLK frequency

1

-

25

-

MHz

REFCLK tolerance

2

-

100

-

ppm

REFCLK M/S ratio

3

40:60

-

60:40

%

REFCLK to TXC

4

5

-

13

ns

Tx PLL in lock

propagation delay

TDAT0

→ 4 to TXC setup time

5

12

-

ns

TDAT0

→ 4 to TXC hold time

6

0

-

ns

RDAT0

→ 4 valid to RXC +Ve edge

7

10

-

ns

RXC to RDAT0

→ 4 invalid

8

10

-

ns

RXC M/S ratio

9

45:55

-

55:45

%

REFCLK to SDT transition

5

-

15

ns

NOTE: Conditions for AC Characteristics:

All AC measurementsare made at aVth + 1.5V and with TTL output loaded with 25pf

Waveform

Value

Timing

Min.

Typ.

Max.

VALID

DATA

VALID

DATA

bit 4

bit 3

bit 2

bit 1

bit 0

bit 4

REFCLK

TXC

TDAT

0

→ 4

TXO

4

2

3

1

5

6

VALID

DATA

RXC

RDAT

0

→ 4

9

5

8

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